From 757e0de89f80e89626cc8b7d6e670c0e5ea7f192 Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Thu, 15 Aug 2013 22:34:06 -0400
Subject: runtime: impose stack size limit

The goal is to stop only those programs that would keep
going and run the machine out of memory, but before they do that.
1 GB on 64-bit, 250 MB on 32-bit.
That seems implausibly large, and it can be adjusted.

Fixes #2556.
Fixes #4494.
Fixes #5173.

R=khr, r, dvyukov
CC=golang-dev
https://golang.org/cl/12541052
---
 src/pkg/runtime/panic.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/pkg/runtime/panic.c')

diff --git a/src/pkg/runtime/panic.c b/src/pkg/runtime/panic.c
index 61afbf6e73..4fbbed1071 100644
--- a/src/pkg/runtime/panic.c
+++ b/src/pkg/runtime/panic.c
@@ -320,8 +320,10 @@ runtime·unwindstack(G *gp, byte *sp)
 		gp->stackbase = top->stackbase;
 		gp->stackguard = top->stackguard;
 		gp->stackguard0 = gp->stackguard;
-		if(top->free != 0)
+		if(top->free != 0) {
+			gp->stacksize -= top->free;
 			runtime·stackfree(stk, top->free);
+		}
 	}
 
 	if(sp != nil && (sp < (byte*)gp->stackguard - StackGuard || (byte*)gp->stackbase < sp)) {
-- 
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